/*
 * Async Treeview 0.1 - Lazy-loading extension for Treeview
 * 
 * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
 *
 * Copyright (c) 2007 Jörn Zaefferer
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 * Revision: $Id: jquery.treeview.async.js 902 2011-06-28 10:53:28Z zijing.zhang $
 *
 */

;(function($) {

function load(settings, root, child, container) {
    $.getJSON(settings.url, {root: root}, function(response) {
        function createNode(parent) {
            var current = $("<li/>").attr("id", this.id || "").html("<span style=\"float:left\">&nbsp;</span>"+this.text+"").appendTo(parent);
            if (this.classes) {
                current.children("span").addClass(this.classes);
            }
            if (this.expanded) {
                current.addClass("open");
            }
            if (this.hasChildren || this.children && this.children.length) {
                var branch = $("<ul/>").appendTo(current);
                if (this.hasChildren) {
                    current.addClass("hasChildren");
                    createNode.call({
                        text:"placeholder",
                        id:"placeholder",
                        children:[]
                    }, branch);
                }
                if (this.children && this.children.length) {
                    $.each(this.children, createNode, [branch])
                }
            }
        }
	$.each(response, createNode, [child]);
	$(container).treeview({add: child});
	/**
	 * repeat menu bug fix 
	 * append by zijing.zhang
	 * 2011-6-17
	 */ 
//	($('.filetree .last').size() == 0) && $.each(response, createNode, [child]);
//	
//        $(container).treeview({add: child});
	
//	/**
//	 * treeview bug fix
//	 * append by zijing.zhang
//	 * 2011-6-17
//	 */ 
//	($('.hitarea').size() > 1) && $('.hitarea').slice(1).remove();
    });
}

var proxied = $.fn.treeview;
$.fn.treeview = function(settings) {
    if (!settings.url) {
        return proxied.apply(this, arguments);
    }
    var container = this;
    load(settings, "source", this, container);
    var userToggle = settings.toggle;
    return proxied.call(this, $.extend({}, settings, {
        collapsed: true,
        toggle: function() {
            var $this = $(this);
            if ($this.hasClass("hasChildren")) {
                var childList = $this.removeClass("hasChildren").find("ul");
                childList.empty();
                load(settings, this.id, childList, container);
            }
            if (userToggle) {
                userToggle.apply(this, arguments);
            }
        }
    }));
};

})(jQuery);